On Thursday, Oct. 29, the Redwood City Improvement Association, a non-profit community benefit district ran by a board of property owners, residents, community members and businesses, will play its latest Magic Lantern 3D Show, “Dia de los Muertos” for Downtown Redwood City’s Halloween extravaganza, “Scare on the Square” presented by the Redwood City Parks, Recreation and Community Services and Facebook, Inc.. The event will include a costume parade, cash prize carved pumpkin contest (bring your own pumpkin already carved), a 3D light show and classic trick-or-treating. The event takes place in the Courthouse Square in Downtown Redwood City from 5:00 p.m. to 8:00 p.m.